ngx::ffi

Function ngx_http_variable_unknown_header

Source 
pub unsafe extern "C" fn ngx_http_variable_unknown_header(
    r: *mut ngx_http_request_s,
    v: *mut ngx_variable_value_t,
    var: *mut ngx_str_t,
    part: *mut ngx_list_part_s,
    prefix: usize,
) -> isize